Staggered circular nanoporous graphene converts electromagnetic waves into electricity

Lv, Hualiang; Yao, Yuxing; Li, Shucong; Wu, Guanglei; Zhao, Biao; Zhou, Xiaodi; Dupont, Robert L.; Kara, Ufuoma I.; Zhou, Yimin; Xi, Shibo; Liu, Bo; Che, Renchao; Zhang, Jincang; Xu, Hongbin; Adera, Solomon; Wu, Renbing; Wang, Xiaoguang

doi:10.1038/s41467-023-37436-6

Cited by 117 publications

(23 citation statements)

References 45 publications

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“…[53][54][55][56] (2) Due to electron migration and hopping, the flower-like forms tend to form 3D conducting networks between them, which contributes to enhanced conductive losses. [57][58][59] (3) 2D organic-inorganic heterostructures provide a rich heterogeneous interface, which facilitates enhanced interfacial polarization. 60 According to Serghei's theory, interfacial polarization is correlated closely with the dielectric properties of the two phases constituting the heterogeneous interface.…”

Section: Rl Dbmentioning

confidence: 99%

Design of two-dimensional organic–inorganic heterostructures for high-performance electromagnetic wave absorption

Ye¹,

Wang²,

Cao³

et al. 2023

J. Mater. Chem. C

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Section: Rl Dbmentioning

confidence: 99%

Design of two-dimensional organic–inorganic heterostructures for high-performance electromagnetic wave absorption

Ye¹,

Wang²,

Cao³

et al. 2023

J. Mater. Chem. C

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“…Magnetic heterostructures, especially at the nanometer level, have great potential for applications in data storage, [1][2][3][4] magnetoresponsive devices, [5][6][7][8][9] and electromagnetic (EM) wave shielding and absorption. [10][11][12][13][14][15][16] They have merits of high atomic utilization efficiency, excellent charge transport ability, and enhanced structural stability.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Interfaces Support the Confined Growth of Magnetic Nanometer‐Sized Heterostructures for Electromagnetic Wave Absorption

Xu,

Luo,

et al. 2023

Adv Funct Materials

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The fabrication of nanometer‐sized magnetic heterostructures with controlled magnetic components and specific interfaces holds great significance in the field of electromagnetic (EM) wave absorption. However, the process of achieving these structures still poses significant challenges. Here, abundant magnetic heterostructures are successfully fabricated by utilizing the surface energy anisotropy differences of the nonasymmetric hammer‐shaped interface to support the nucleation and growth of magnetic heterostructure components while effectively inhibiting their aggregation. Through a confined growth strategy via in situ growth of FeOOH and sequentially precise thermal treatments, dispersion of the heterostructures is achieved at the nanometer scale, while also observing a high degree of chemical stability due to occurrence of a charge‐compensation effect at the interface. Consequently, a series of magnetic heterostructures are obtained via phase translations of FeOOH precursors. The nanometer‐sized heterostructures demonstrate multilevel interfacial polarization effects. Furthermore, the hierarchical core–shell structure of the heterostructures promotes anisotropic polarization absorption. As a result, the multiple interfaces and nanometer‐sized Fe/Fe3O4@SiO2@Fe‐2 heterostructures demonstrate improved EM wave attenuation performance. Remarkably, they achieve an absorption bandwidth of 9 GHz at a thickness of 1.8 mm. A novel avenue is introduced here for investigating the intricate relationship between structure and properties in magnetic heterostructures.

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“…Nowadays, various carbonaceous particles and their modifications are of high interest for their utilization in many applications, such as capacitors, electromagnetic wave absorption, , and for conversion of wasted electromagnetic energy into electricity . Carbonaceous particles have also been widely used as a dispersed phase in ER fluids for the last decade owing to their tunable conductivity and ease of preparation. , Various particulate systems based on carbonized conducting polymers − or their derivatives , have been introduced in electrorheology, and their conductivity is commonly controlled through the carbonization temperature .…”

Section: Introductionmentioning

confidence: 99%

Engineering Conductivity and Performance in Electrorheological Fluids Using a Nanosilica Grafting Approach

Pavlikova,

Plachy,

Urbanek

et al. 2023

ACS Appl. Nano Mater.

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Carbonization is considered an effective process for the preparation of carbon-rich solids for various applications. Raw carbonaceous particles however often possess high electrical conductivity, limiting their applicability in electrorheology. To address this drawback, the carbonaceous particles prepared from glucose through hydrothermal synthesis, followed by thermal carbonization in an inert atmosphere, were subsequently coated by compact and mesoporous nanosilica, giving rise to semiconducting particles. The successful coating was confirmed using transmission electron microscopy and spectroscopic analysis, and the composite particles were further used as a dispersed phase in electrorheological (ER) fluids of concentration 5 wt %. While an ER fluid based on pure carbonized particles caused a short circuit of the measuring device at the electric field of intensity 1 kV mm–1, the ER behavior of its analogue based on mesoporous silica-coated particles was successfully measured up to 3 kV mm–1, giving a high yield stress exceeding even the values estimated for ER fluids based on similar carbonaceous particles coated with a compact silica layer. Even though the conductivity decreased only about one order of magnitude after the coating process, the dielectric properties of the prepared ER fluid differed significantly, the relaxation process was shifted to lower frequencies, and most importantly, the dielectric relaxation strength increased, indicating an increased amount of interactions. The presence of mesoporous nanosilica further enhanced the sedimentation stability of the ER fluids when compared to its analogue with the compact silica coating, expanding the scope of practical applicability.

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Staggered circular nanoporous graphene converts electromagnetic waves into electricity

Cited by 117 publications

References 45 publications

Design of two-dimensional organic–inorganic heterostructures for high-performance electromagnetic wave absorption

Design of two-dimensional organic–inorganic heterostructures for high-performance electromagnetic wave absorption

Anisotropic Interfaces Support the Confined Growth of Magnetic Nanometer‐Sized Heterostructures for Electromagnetic Wave Absorption

Engineering Conductivity and Performance in Electrorheological Fluids Using a Nanosilica Grafting Approach

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